The cheapest times to fly from DUT to SEA are

  • January 15th to February 25th
  • March 12th to April 1st
  • June 25th to July 8th
  • August 20th to December 9th (except the week of November 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from DUT to SEA is late January. Prices can be as high as $1662 for Wednesday flights during mid December, or as low as $1209 for Thursday flights around late January.


When to Fly to Seattle

Flying from Unalaska, AK (DUT) to Seattle, WA (SEA) will usually cost between $1209 to $1391 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $1211. Due to high demand the most expensive time to fly is mid December, with an average price of $1441. Planning your trip to low-cost times can easily save you $230 on economy flights and even more on first-class flights. Generally, any price below $1241 can be considered a good price for a round-trip DUT to SEA flight.

See below for a graph of average weekly prices for the DUT to SEA route. All prices are for round-trip tickets in USD.

DUT to SEA Flight Prices

Compared to other flights, the DUT to SEA flight is slightly more expensive than the average and costs less than the average flight leaving from Unalaska. The average price per mile (for a direct flight) is $0.39, which is a bit above average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to depart and return on this flight. Wednesdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $23 (2%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $1251. Return trip prices are from the SEA to DUT flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from DUT to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 4 hour 30 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from DUT to SEA? We’ve got answers.

Which airlines fly this route?

You can find 1 major airline flying this route most often: Alaska, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to Unalaska Airport?

The distance between the two airports is roughly 1953 miles or 3143 kilometers.

How long does it take to fly from DUT to SEA?

The real-world flight time for a nonstop DUT to SEA flight is about 4 hour 30 minutes.

How many flights go between Unalaska, AK and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 16 available flights from DUT to SEA.


Airport Location Info


Departing Airport

Origination code DUT
Origination airport name Unalaska Airport
City Unalaska, AK
Country the United States
Latitude 53.9
Longitude -166.5

Return Airport

Destination code SEA
Destination airport name Seattle/Tacoma International Airport
City Seattle, WA
Country the United States
Latitude 47.5
Longitude -122.3


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.